bug#15412: 24.3.50; ffap too lax in C++ mode

[Ivan Andrus]

I have mapped `find-file-at-point' to C-x C-f, but in `c++-mode' it
thinks that things with double colons (like std::map) are files (or urls
actually).  Except that of course they aren't and so I have to delete
the incorrect starting input.  It's not hard to delete it, but it is
annoying.

The problem seems to be that `ffap-url-at-point' passes `t' for the
`lax' parameter of `thing-at-point-url-at-point'.  I'm not sure what the
ramifications of changing that parameter would be.

-Ivan

In GNU Emacs 24.3.50.1 (i386-apple-darwin12.5.0, NS apple-appkit-1187.39)
of 2013-09-16 on ivanandres-MacBookPro
Bzr revision: 114309 rgm@gnu.org-20130916192145-tr5qrfdmhcq3a563
Windowing system distributor `Apple', version 10.3.1187
Configured using:
`configure --with-ns --with-xml2'

Important settings:
 locale-coding-system: nil
 default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
 diff-auto-refine-mode: t
 eldoc-mode: t
 highlight-parentheses-mode: t
 hl-sexp-mode: t
 highlight-symbol-mode: t
 which-function-mode: t
 show-paren-mode: t
 msb-mode: t
 minibuffer-depth-indicate-mode: t
 global-hl-line-mode: t
 delete-selection-mode: t
 auto-image-file-mode: t
 auto-insert-mode: t
 yas-global-mode: t
 shell-dirtrack-mode: t
 ido-everywhere: t
 global-visible-mark-mode: t
 visible-mark-mode: t
 gvol-mode: t
 recentf-mode: t
 desktop-save-mode: t
 drag-stuff-global-mode: t
 drag-stuff-mode: t
 tooltip-mode: t
 mouse-wheel-mode: t
 tool-bar-mode: t
 menu-bar-mode: t
 file-name-shadow-mode: t
 global-font-lock-mode: t
 font-lock-mode: t
 blink-cursor-mode: t
 auto-composition-mode: t
 auto-encryption-mode: t
 auto-compression-mode: t
 column-number-mode: t
 line-number-mode: t
 transient-mark-mode: t

Recent input:
C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k
C-k C-e C-u C-u M-r C-k C-k C-k C-k C-k C-k C-k C-k
TAB C-j M-s <C-tab> <C-tab> <C-tab> TAB TAB M-x c u
s t C-s <return> f i n <tab> f i <tab> - a <tab> <backspace>
<tab> <tab> <backspace> <backspace> <backspace> <backspace>
<C-backspace> <C-backspace> f f a p <tab> <return>
<help-echo> <down-mouse-1> <mouse-1> C-x C-r <help-echo>
C-s u C-g C-a <help-echo> <help-echo> <down-mouse-1>
<mouse-1> <help-echo> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-1> <help-echo> <down-mouse-1> <mouse-1> <help-echo>
C-r u r l C-r C-r C-r C-r C-r C-r C-a <up> <up> <up>
<up> <left> <left> <return> <return> <down> <down>
<down> C-x C-r <return> <return> <down> <down> <down>
<return> <return> <down> <down> <down> <return> <return>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> C-x C-r <down> <down>
<down> <return> <down> <down> <up> <up> <return> <down>
<down> <down> <down> <down> <down> <return> <return>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <return> <return> <down> <down> <down> <return>
<down> <down> C-e <left> <left> <right> <right> <right>
<left> <left> <return> <down> <down> <down> <right>
<right> <return> <up> <up> <up> <up> <up> <up> <up>
<up> <up> <up> <up> <down> <return> M-w C-M-j C-M-j
C-M-j C-M-j C-M-j C-M-j C-M-j C-M-l C-M-j C-M-l C-M-j
C-M-l C-M-j C-M-l C-M-j C-M-l C-M-j C-M-l C-M-j C-k
C-M-l C-M-l C-M-l C-M-l <C-tab> M-w M-w M-: , , t h
i n <tab> - <backspace> SPC ' u r l <return> <C-tab>
<C-tab> C-M-u C-M-u C-M-u C-M-u C-o C-o C-M-j C-M-k
C-/ <C-tab> M-: , , C-y <return> M-: <up> C-e <left>
SPC t <return> <C-tab> <C-tab> C-a C-M-k C-M-k M-w
C-x C-s M-x g r e <backspace> <backspace> <backspace>
b <backspace> r e p o <return>

Recent messages:
nil
lax: t
allowed-chars: "--:=&?$+@-Z_[:alpha:]~#,%;*()!'"
skip-before: "^[0-9a-zA-Z]"
skip-after: ":;.,!?"
pt: 5
beg: 1
end: 9
(1 . 9)
(No changes need to be saved)

Load-path shadows:
~/vcs/emacs-clang-complete-async/auto-complete-clang-async hides 
/Users/ivanandres/.emacs.d/elpa/auto-complete-clang-async-20130526.2314/auto-complete-clang-async
/Users/ivanandres/.emacs.d/elpa/confluence-20130814.735/confluence-edit hides 
/Users/ivanandres/.emacs.d/elpa/confluence-edit-20130804.2241/confluence-edit
/Users/ivanandres/vcs/sage-mode/emacs/.dir-locals hides 
/Users/ivanandres/.emacs.d/elpa/highlight-parentheses-20130523.1752/.dir-locals
/Users/ivanandres/vcs/sage-mode/emacs/.dir-locals hides 
/Users/ivanandres/.emacs.d/elpa/highlight-symbol-20130628.1552/.dir-locals
/Users/ivanandres/.emacs.d/elpa/php+-mode-20121129.1452/string-utils hides 
/Users/ivanandres/.emacs.d/elpa/string-utils-20121108.1917/string-utils
/Users/ivanandres/.emacs.d/elpa/jira-20091012.2123/jira hides 
~/.emacs.d/local/jira
/Users/ivanandres/vcs/sage-mode/emacs/.dir-locals hides 
/Users/ivanandres/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/lisp/gnus/.dir-locals

Features:
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semantic/decorate pulse auto-complete popup edmacro kmacro ibuf-macs
gnutls jira xml-rpc timezone tramp-cmds tramp-cache tramp-sh
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server easy-mmode assoc advice windmove ac-math-autoloads
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custom widget hashtable-print-readable backquote make-network-process ns
multi-tty emacs)